White Plymouth Rock

Japanese: White Plymouth Rock(英語表記)WhitePlymouthRock
White Plymouth Rock

...The egg-laying capacity is about 250 eggs per year, but those bred in Japan are small but have high egg-laying capacity, with a record of 365 eggs. The White Plymouth Rock, a mutant of this breed, was bred with the White Cornish to increase meat volume, so it lays only 200 eggs per year, which is a little low, but it has excellent egg-laying capacity and is widely used in broiler production. The Rhode Island Red (illustration) is a dual-purpose breed native to the United States. ...

*Some of the terminology that mentions "White Plymouth Rock" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…産卵能力は年に約250個であるが,日本で改良されたものは,体が小型であるが産卵能力は高く,365個の記録も作られている。本種の突然変異種である白色プリマス・ロック種White Plymouth Rockは,肉量を増す目的で白色コーニッシュ種が交配されているため,産卵数は年200個とやや少ないが産卵性に優れ,ブロイラー生産に多用されている。ロード・アイランド・レッド種Rhode Island Red(イラスト)はアメリカ原産の兼用種。…

※「White Plymouth Rock」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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